The graphene too, when it was hard to make the handful of experiments on it were already showing odd electrochemical properties. Now that it is less expensive to obtain, I suspect we'll start bumping into all sorts of strange things. One particularly interesting one was apparent high temp superconduction in the presence of certain classes of hydrocarbons.
I've not seen that research or finding. It seems we're super early in the potential of 2D materials, especially as you say, as they come down the cost curve.